Wheel for railroad vehicles



Nov. 18, 1930. P. M. BOURDON 1,782,235

WHEEL FOR RAILROAD VEHICLES I Filed Sept. 15. 1930 9, 5: co i 0[ave/2607'.-

Patented Nov. 18, 1930 UNITED STATES PATENT OFFICE PIERRE MARCELBOURBON, OF PARIS, FRANCE, ASSIGNOR TO MICHELIN CIR, O1

CLERMONT-FEBRAND, FRANCE, A CORPORATION OF FRANCE WHEEL FOB RAILROADVEHICLES Application filed September 1-5, 1930, Serial No. 482,032, andin France 0ctober28, 19.

The present invention relates to the flanges of railroad vehicle wheels.It has for its primary object to prevent the flanges of these wheelsfrom transmitting to the wheels and consequently to the vehicle itself,the noise and vibrations caused by the friction-of the flange againstthe rail-head, particularly in curves.

My invention is particularly applicable to railroad vehicle wheelsprovided with pneumatic tyres, which wheels are thus rendered perfectlysound-proof. .However it is to be understood that the invention may beused with advantage with all railroad vehicle wheels and in particularwith steel railroad vehicle wheels.

I have shown by way of example several applications of my inventionin-accompanying drawings.

Fig. 1 is a sectional view of the flange according to my inventionapplied to a wheel provided with a pneumatic tyre of the type whereinthe flange forms part of the peripheric protecting plate.

Fig. 2 is a similar view showing the flange used with a wheel carrying apneumatic tyre, said flange forming part of an independent side platesecured to the wheel.

Fig. 3 is a plan view of a particular form of execution of the flange.

Fig. 4 shows a flange according to my invention used with a wheel havingno pneumatic tyre.

My improved flange comprises three'superposed parts: 4

The first part A forms part of an element secured to the wheel or to thewheel tyre; the second part B is an insulating or vibrationdamping partand the third C is adapted to bear against the rail-head 5.

In Fig. 1, part A is constituted by a part secured to or integral withthe plate 11 serif;- ing as an outer cover for therubber or similar tyrecarried by the wheel 3.

In Fig. 2 the part A is secured to or is integral with the side plate 13carried by the support of the yielding part 4 of the-rim which isprovided with a cover 14 independent of the flange.

In Fig. 4 the arrangement is similar to superposition of three annularthat of Fig. 2 except that the part A is dis posed like the usual wheelflanges i. o. it is cast in one with or secured to the metal part 15 ofthe wheel. I

As the annular plate C is adapted to rub against the rail-head 5, it isalone liable to wear and consequently requires alone to be replaced. Itmay be made of a ver resistant metal unless it is desired to re uce thewear of the rail head at the expense of '60 the lining 0. As this liningis easy to rein Fig. 3. In this device the outer lining I C, instead offorming a continuous ring is constituted by a series of independentsegments C C C This arrangement reduces still more the noise bypreventingv the vibrations arising at the point of contact between theflange and the rail-head from being transmitted to the whole part C ofthe flange and-thereby to the whole of the wheel.

What I claim is:

1. A flange for railroad vehicle wheels comprising a part secured tothewheel' rim, a part adapted to rub against the rail-head and anelastic vibration-damping part interposed between the two first parts.

2. A flange for railroad'vehicles com rising a flat ring secured to theoutside 0 the wheel rim, a coaxial flat ring adapted to rub against therail-head and an elastic flat vi bration-damping ring interposed betweenthe two first rings.

, 3. A railroad vehicle wheel comprisin a wheel body, a tyre carriedthereby an a flange fitted over the tyre constituted by the which oneouter part forms the ro ing surface adapted to be in contact with therailhead, the other outer part .forming a suparts of port and the middlepart being insulating and sound-damping.

4. A flange for railroad vehicles comprising a flat supporting ring, ayielding sounddamping ring carried thereby, a plurality of segmentalparts carried on the outside of last "mentioned ring for contact withthe railhead and gountersunk elongated means securing the segmentalparts to the super- 10 P e rings- In testimony that I claim .theforegoing as my invention, I have si ed my name.

PIERRE MAR EL BOURBON.

